| Field | Data Type | Description | |-------|-----------|-------------| | id | UUID | Unique identifier for the mark | | timestamp_start | Float (seconds) | Beginning of the annotated segment | | timestamp_end | Float (seconds) | End of the segment | | type | Enum | Category of melodic feature (e.g., interval , contour , motif , scale‑degree ) | | value | Structured object | Detailed description (see examples) | | confidence | Float (0‑1) | How certain the annotator is about the analysis | | author | User ID | Who created the mark | | license | URI | Rights information (CC‑BY, CC‑0, etc.) |
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